RU176552U1 - CONTAINER FOR ACCOMMODATION OF A CORROSION INHIBITOR IN THE METAL TANK OF THE FIRE VEHICLE - Google Patents

Abstract

The utility model relates to the field of devices that add disinfectant, deodorizing and cleaning substances to the water during descent or in the wash tank, and can be used to protect tanks of fire engines from corrosion. The technical result achieved by using the claimed utility model is to ensure high reliability of fastening a plastic container with a corrosion inhibitor inside the tank. The container for placing a corrosion inhibitor in a metal tank of a fire truck, according to the claimed technical solution, comprises a PLA plastic case 800 mm long, 300 mm wide and 140 mm high, consisting of a base and a lid interconnected by an elastic jumper to open and close container for placement of a corrosion inhibitor in it; on the container lid in the center there is an arrow-shaped locking latch made with the possibility of fixing the lid with a base on which two neodymium magnetic mounts with an adhesion force of 30-50 N each, with the possibility of mounting in a tank, are located on the axis, while the lid is made with holes with a diameter of 1-2 mm to allow water from the tank to enter the container’s internal cavity; sodium bicarbonate and octadecylamine are used as a corrosion inhibitor in the ratio of 1:13 wt.%. 1 s.p. f-ly, 11 ill.

Description

The utility model relates to the field of devices that add disinfectant, deodorizing and cleaning substances to the water during descent or in the wash tank, and can be used to protect tanks of fire engines from corrosion.

Known patent RU 2534526 from 05/07/2010 "Spherical blocks for the toilet, a method for their manufacture and hanging containers with spherical blocks for the toilet," which proposed a cleaning block for the toilet, containing fragrance, at least one non-ionic surfactant, and also at least one alkylbenzenesulfonate and at least one olefin sulfonate, which can be formed on a rolling machine or in the press to obtain a body symmetrical about the axis of rotation, in particular a ball, and is used in a system of at least one cleaning unit and at least one metering device. The cleaning blocks were cut, which were then introduced into the appropriate containers. The disadvantages of the device are the lack of devices for attaching to the inner surface of the metal tank of a fire truck.

In addition, fillers are not corrosion inhibitors.

The device proposed in US patent 2726406 from 12/13/1955, contains a storage container containing a disinfectant to be dispensed and attached at its base to an outlet, which may be blocked by a valve attached to the float.

Obviously, such a device also has the disadvantages observed in the other mentioned devices known in the art, namely, the impossibility of mounting the device inside the metal tank of a fire truck. In addition, the filler is not a corrosion inhibitor.

Known patent of the Russian Federation 2395648 from 06/29/2006 "Dispenser of cleaning agent for flushing tank" to a device that is designed to supply the exact amount of cleaning substances and in which the filling time of the tank flushing device of the toilet is very little dependent on the amount of liquid substance.

The device is designed to dispense a predetermined amount of liquid cleaning agent into the tank of the toilet flushing device during operation of the latter. The disadvantages of this device are the design complexity, the inability to fix on the inner surface of the metal tank of a fire truck.

As a prototype, we took a device like a drawer, which is described in French patent FR 2618470. It contains a cleaning substance in a storage container, on the bottom of which there is a movable overlapping element that slides vertically under the action of a float, which is controlled by the level of water contained in the flush device. When the flushing device is full, the float moves the blocking element to the upper position, and when the flushing device is empty, the float moves the blocking element down to the lower position. This overlapping element is designed in such a way that in the upper position the stored liquid is able to enter the cavity of the latter and its lower part is closed, while in the lower position the lower part of the overlapping element communicates with the inner cavity of the tank of the flushing device, and the upper part is closed. Thus, when the closure element is in the upper part, the liquid from the storage container enters the closure element, and when the float is in the lower position, the volume of the substance contained in the closure element has no obstacles for the flushing device to flow into the reservoir. However, devices of this type, like those mentioned above, have the disadvantage that this device cannot be attached to the inside of the tank and the filler is not a corrosion inhibitor.

The objective of the utility model is to fasten a plastic container with a corrosion inhibitor inside the tank.

The technical result achieved by using the claimed utility model is to ensure high reliability of fastening a plastic container with a corrosion inhibitor inside the tank.

The technical result is achieved through the use of 2 neodymium magnets located along the longitudinal axis of the container, fixed with screws, the adhesion force of 30-50 N.

The utility model is illustrated by the drawings of FIG. 1 - FIG. 11, where:

FIG. 1 - general view of the container, where: 1 - base, 2 - magnet, 3 - screw, 4 - metal gasket, 5 - lid, 6 - corrosion inhibitor, 7 - latch,

FIG. 2 - container (bottom),

FIG. 3 - container (top),

FIG. 4 - open container (inside),

FIG. 5 - container open (outside),

FIG. 6 - magnet

FIG. 7 (A, B) - swept latch,

FIG. 8 - a sample of carbon steel grade STZSP (control sample),

FIG. 9 - a sample of carbon steel grade STZSP after being in a tank with water in the presence of a corrosion inhibitor (3 months),

FIG. 10 - a sample of carbon steel grade STZSP after being in a tank with water without a corrosion inhibitor (3 months),

FIG. 11 - a sample of carbon steel grade STZsp after being in a tank with water without a corrosion inhibitor (12 months).

The container consists of two parts: the base 1 and the lid 5, interconnected by an elastic ligament (jumper) that allows you to open and close the container to place the corrosion inhibitor 6. In it, sodium bicarbonate and octadecylamine are used as a corrosion inhibitor in a ratio of 10 ... 15: 1 the weight. % On the opposite side of the elastic ligament (jumper) on the top lid of the container 5 is located in the center of the arrow-shaped locking latch 7 (Fig. 1, 7A, 7B), made with the possibility of fixing the lid 5 on the base of the container. The container body (base, cover) in one stage is printed on a 3D printer Ultimaker2 from PLA plastic by the method of layer-by-layer deposition. For this, a 3d model was previously built in the Blender program.

Two neodymium magnets are located inside the container (on the base) for fastening to the fire truck’s tank along the container’s longitudinal axis - a magnetic mount with a C16 (M4) screw with a grip force of 30 N each (China-Base Ningbo Foreign Trade Co., Ltd, China) . 6, secured by a nut with an adhesion force of 30-50 N.

To prepare a corrosion inhibitor, 238 g of sodium bicarbonate and 18 g of octadecylamine were placed in the base of the container (13: 1 wt.%). The particle size is 5-10 microns, which corresponds to a commercial product and GOST 5100-85 for sodium bicarbonate and TU 6-36-1044808-361-89 for octadecylamine. Previously, the openings of the container lid were sealed with polyethylene tape with an adhesive layer with a width of 50-80 mm GOST 20477-86 outside to prevent the inhibitor from spilling out if the container fell or turned over from the base onto the lid or side of the container.

To prevent precipitation from the base of the container when pouring the corrosion inhibitor, the height of the layer of the inhibitor should not exceed 80 mm - the height of the base of the container. The filling capacity of the container with the inhibitor is 57% of its total volume. The lid was closed on an arrow-shaped latch and the closed container was vigorously shaken for 0.5-1 min. to mix the contents.

There are holes with a diameter of 1-2 mm on the lid. This diameter of the holes does not allow the inhibitor to fall out of the container when removing the protective film after placing the container in the tank of a fire truck. However, this size of the holes does not interfere with the penetration of water into the container, the gradual dissolution of the corrosion inhibitor and its diffusion into the working volume of the tank. Deviation from the given dimensions of the container openings in the direction of their increase leads to a rapid precipitation of the inhibitor from the container and does not allow it to be used repeatedly during the operation of a fire truck. Reducing the size of the holes (less than 1 mm) makes it difficult for water to enter the container. In this case, the inhibitor in the container is not soluble in water, its diffusion into the working volume of the tank does not occur, and there is no useful effect on protecting the tank against corrosion.

Before placing the container in the water of the tank of a fire truck ZIL AC 2.5 / 40 (tank volume of 2500 l), a polyethylene tape with an adhesive layer was removed from the container lid to release the lid openings and to provide water access to the inhibitor's internal cavity.

Example.

To assess the effectiveness of the inhibitor, a comparative analysis was made of the presence of samples of carbon steel of the StZsp grade (GOST 380-2005) in water and an aqueous solution of the proposed corrosion inhibitor based on sodium bicarbonate and octadecylamine. The dimensions of the container were: length 800 mm, width 300 mm, height 140 mm. The height of the container lid was 60 mm, and the base 80 mm. The weight of the container is 244 g. The lid of the container has 101 holes with a hole diameter of 1-2 mm.

Before placing the samples in water and an aqueous solution of the inhibitor, they were degreased with ethyl alcohol and acetone. Samples were weighed and placed in water and an aqueous solution of the inhibitor (13: 1 wt.%). The inhibitor concentration was 0.1 mg / ml. After 1, 2, 3, 6 and 12 months, respectively, the samples were removed from water and an aqueous solution of a corrosion inhibitor. After machining the samples to remove corrosion products, the samples were weighed. The results are presented in the table and in FIG. 8-11.

A comparative analysis of the corrosion of StZsp steel in water and in an aqueous solution of sodium bicarbonate inhibitor and octadecylamine (C = 0.1 mg / ml) is given in the table. This concentration corresponds specifically to a ratio of 13: 1% by weight. in terms of the volume of the tank 2500 liters of fire truck ZIL AC 2.5 / 40.

It was experimentally established that a sample of carbon steel StZsp (GOST 380-2005) in an inhibitor solution does not undergo changes in weight for 12 months. This fact indicates the absence of corrosion of the carbon steel sample in an aqueous solution of the inhibitor. Due to the corrosion process leading to the destruction of a carbon steel sample in water, the weight of the sample is reduced by 7 times. The results indicate a high efficiency of the proposed corrosion inhibitor. Using a ratio of more than 15: 1 weight. % economically impractical. Using a ratio of less than 10: 1 weight. % leads to partial corrosion of StZsp.

Claims (2)

1. A container for placing a corrosion inhibitor in a metal tank of a fire truck, comprising a housing made of PLA plastic with a length of 800 mm, a width of 300 mm and a height of 140 mm, consisting of a base and a lid interconnected by an elastic jumper to open and close the container for placement it contains a corrosion inhibitor; on the container lid in the center there is an arrow-shaped fixing latch that is capable of fixing the lid with a base on which two neodymium magnets are located along the longitudinal axis x fastening adhesive force of 30-50 N, each with the possibility of fixing in the tank, the lid is provided with holes 1-2 mm in diameter for the ingress of water from the tank into the inner cavity of the container. 2. The container according to claim 1, characterized in that sodium bicarbonate and octadecylamine are used as a corrosion inhibitor in a ratio of 1:13 wt.%.

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